Jodel DR1050 aircraft were on a C of A, and we were existing from Annual to * Annual with the "Engine Fund" contunually disappearing in maintenance. With no increase in hourly or monthly charge, we now run on an LAA Permit, at a profit, and the engine fund is more than proportional to the engine hours to TBO - with "on condition" likely after that. (We're already "on condition" due to engine years at present.)